DUPLEX 650 Flexi 3
| Certified since | 07 Февруари 2023 |
| Climate zone | Cool, temperate |
| Air flow range from… | 150 m3/h |
| Air flow range to… | 600 m3/h |
| Specific electric power | 0.41 Wh/m3 |
| Heat recovery rate | 79% |
| Humidity recovery (winter) | - |
| Humidity recovery (summer) | - |
| Performance number | 12 |
| At external pressure | 190 Pa |
| Available external pressure (with installed filters) | 121 Pa |
| Company headquarters | Czech Republic (CZ) |